Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A non-transitory computer readable medium storing instructions executable by a hardware processor to: determine that a client device is assigned an Internet Protocol (IP) address by a Dynamic Host Configuration Protocol (DHCP) server; share user entries and DHCP server information among a plurality of network controllers that are in a Virtual Local Area Network (VLAN); detect that the client device is disconnected from a first network controller among the plurality of network controllers, based in part on the shared user entries, DHCP server information, and a determination that none of the plurality of network controllers detects a connection with the client device, wherein the first network controller is associated with the IP address; and responsive to the detection that the client device is disconnected from the first network controller: generate a DHCP release message on behalf of the client device; and transmit the DHCP release message to the DHCP server.
This invention relates to network management in a Virtual Local Area Network (VLAN) environment, specifically addressing the challenge of efficiently managing IP address assignments when client devices disconnect from network controllers. In a VLAN, multiple network controllers share user entries and DHCP server information to coordinate network operations. The system detects when a client device disconnects from a first network controller by analyzing shared data and confirming that no other network controller detects an active connection with the device. Upon detecting disconnection, the system generates a DHCP release message on behalf of the client device and transmits it to the DHCP server. This ensures that the IP address assigned to the disconnected device is promptly released, preventing address conflicts and improving network resource utilization. The solution automates the release process, reducing manual intervention and enhancing network efficiency in dynamic environments where devices frequently connect and disconnect. The system relies on shared data among network controllers to accurately track device connections and trigger appropriate DHCP actions.
2. The medium of claim 1 , wherein the instructions to determine that the client device is assigned the IP address by the DHCP server comprise instructions executable by the processor to snoop a message between the DHCP server and the client device.
A system for network address assignment monitoring involves a network device configured to detect whether a client device has been assigned an IP address by a DHCP server. The system includes a processor and a memory storing instructions executable by the processor. The instructions enable the network device to monitor communications between the DHCP server and the client device by snooping messages exchanged during the DHCP process. This allows the network device to verify that the client device has successfully obtained an IP address from the DHCP server. The system may also include additional features such as logging the assignment, alerting network administrators, or enforcing network policies based on the detected IP address assignment. The network device may be a switch, router, or other intermediary device capable of intercepting and analyzing DHCP-related traffic. The solution addresses the need for reliable IP address assignment verification in network environments where DHCP is used, ensuring proper device connectivity and network management.
3. The medium of claim 1 , wherein the instructions to detect that the client device is disconnected from the first network controller comprise instructions executable by the processor to receive a de-association message from the client device.
A system for managing network connections in a wireless communication environment addresses the problem of efficiently detecting and responding to client device disconnections from a network controller. The system includes a processor and a non-transitory computer-readable medium storing instructions that, when executed by the processor, perform operations to monitor and manage network connections. The instructions detect when a client device is disconnected from a first network controller by receiving a de-association message from the client device. This message indicates that the client device has intentionally or unintentionally terminated its connection with the network controller. Upon detecting the disconnection, the system may initiate actions such as re-establishing the connection, logging the event, or notifying other network components. The system may also include instructions to handle other network-related tasks, such as managing authentication, maintaining connection stability, or optimizing network performance. The solution ensures seamless network operation by promptly identifying disconnections and taking appropriate measures to maintain connectivity or transition the client device to an alternative network controller if necessary. This approach improves network reliability and user experience by minimizing downtime and ensuring continuous service availability.
4. The medium of claim 1 , wherein the instructions to detect that the client device is disconnected from the first network controller comprise instructions executable by the processor to determine that a session or an entry corresponding to the client device has timed out.
This invention relates to network management systems that monitor and manage client device connections to network controllers. The problem addressed is ensuring reliable detection of client device disconnections to maintain network stability and security. The invention provides a method for detecting when a client device is disconnected from a network controller by monitoring session timeouts or corresponding entries in a network database. When a session or entry associated with the client device exceeds a predefined timeout period, the system determines that the client device is no longer connected. This detection mechanism helps prevent unauthorized access and ensures efficient resource allocation by promptly identifying inactive connections. The system may also include additional features such as logging disconnection events, notifying administrators, or reallocating network resources. The invention is particularly useful in environments where maintaining accurate connection status is critical, such as enterprise networks, cloud computing platforms, or IoT deployments. By leveraging timeout-based detection, the system avoids false positives and ensures timely disconnection handling.
5. The medium of claim 1 , wherein the instructions to detect that the client device is disconnected from the first network controller comprise instructions executable by the processor to determine that the client device has failed to respond to one or more messages transmitted to the client device.
A system monitors client devices connected to a network controller to detect disconnections. The system includes a processor and a memory storing instructions that, when executed, perform operations to identify when a client device is no longer connected to the network controller. Specifically, the system detects disconnections by determining that the client device has failed to respond to one or more messages sent to it. This failure to respond indicates a loss of connectivity. The system may also include additional features, such as tracking connection statuses, logging disconnection events, or triggering alerts when disconnections occur. The primary goal is to ensure reliable network monitoring by promptly identifying and responding to client device disconnections, which can help maintain network stability and performance. The system may be part of a larger network management framework that handles multiple client devices and network controllers.
6. The medium of claim 1 , wherein the instructions to detect that the client device is disconnected from the first network controller comprise instructions executable by the processor to determine that the client device has connected to a second network controller among the plurality of network controllers.
This invention relates to network management systems that monitor and manage client devices connected to multiple network controllers. The problem addressed is detecting when a client device disconnects from one network controller and connects to another, ensuring seamless network management and service continuity. The system includes a processor and a non-transitory computer-readable medium storing instructions. When executed, these instructions enable the processor to monitor client device connections across multiple network controllers. Specifically, the system detects disconnection from a first network controller by determining that the client device has instead connected to a second network controller within the same network infrastructure. This detection allows the system to update network configurations, maintain service continuity, and prevent disruptions. The solution ensures that client devices are properly tracked and managed even as they transition between different network controllers, improving network reliability and user experience. The system may also include additional features such as load balancing, security monitoring, and automated reconfiguration to support dynamic network environments.
7. The medium of claim 1 , wherein the instructions to generate generating the DHCP release message on behalf of the client device comprise instructions executable by the processor to identify a source of the DHCP release message as the client device.
A system and method for managing Dynamic Host Configuration Protocol (DHCP) operations in a network environment. The technology addresses the challenge of efficiently releasing DHCP leases when a client device disconnects or transitions between networks, ensuring proper resource management and avoiding IP address conflicts. The system includes a network device, such as a switch or router, that monitors client device activity and generates DHCP release messages on behalf of the client device when necessary. This proactive approach prevents orphaned IP addresses and optimizes network performance. The system identifies the client device as the source of the DHCP release message to ensure proper handling by the DHCP server, maintaining accurate lease records and network stability. The solution is particularly useful in environments with high client mobility, such as enterprise networks or public Wi-Fi hotspots, where manual lease management is impractical. By automating the release process, the system reduces administrative overhead and improves network efficiency. The network device may also include additional features, such as detecting client disconnection events or tracking lease expiration times, to further enhance DHCP management. The overall system ensures seamless network operations while minimizing resource waste.
8. The medium of claim 1 , wherein the instructions to perform the generate and transmit operations are further responsive to a determination that a DHCP lease associated with the IP address has not expired.
A system and method for managing network communications involves a computing device that generates and transmits a network packet containing an Internet Protocol (IP) address. The device determines whether a Dynamic Host Configuration Protocol (DHCP) lease associated with the IP address has not expired before performing these operations. This ensures that the IP address remains valid and avoids conflicts or disruptions in network communication. The system may also include additional features such as validating the IP address, checking for network connectivity, and handling errors if the IP address is invalid or the network is unreachable. The method ensures reliable communication by confirming the IP address is properly assigned and active before transmitting data, preventing issues related to expired or invalid addresses. This approach is particularly useful in environments where IP addresses are dynamically assigned and may change over time, such as in local area networks (LANs) or wireless networks. The system may be implemented in various networked devices, including servers, routers, or client devices, to maintain stable and efficient network operations.
9. The medium of claim 1 , wherein the instructions to perform the generate and transmit operations are further responsive to a determination that a DHCP release message has not been transmitted by the client device.
A system and method for managing network device communication involves a computing device that generates and transmits a network configuration message to a client device. The network configuration message includes configuration parameters for the client device to establish a network connection. The system monitors the client device's network activity and determines whether a DHCP release message has been transmitted by the client device. If no DHCP release message is detected, the system proceeds with generating and transmitting the network configuration message. This ensures that the client device receives necessary configuration parameters even when it does not explicitly request them or release prior configurations. The system may also include additional features such as validating the client device's identity, encrypting the network configuration message, or dynamically adjusting configuration parameters based on network conditions. The solution addresses the problem of unreliable or incomplete network configuration in environments where client devices may not properly signal their readiness for new configurations, improving network stability and reducing manual intervention.
10. The medium of claim 1 , wherein the instructions to detect that the client device is disconnected from the first network controller comprise instructions executable by the processor to: send an address resolution protocol request to the client device; and determine the client device is no longer associated with the first network controller when a response is not received from the client device in receipt of the address resolution protocol request.
This invention relates to network management systems that monitor and manage client device connections within a network. The problem addressed is the need for efficient and reliable detection of client device disconnections from a network controller to ensure seamless network operation and security. The system includes a network controller that manages client device connections and a processor executing instructions to monitor these connections. When a client device disconnects, the network controller must promptly detect this event to prevent unauthorized access or service disruptions. The system detects disconnections by sending an Address Resolution Protocol (ARP) request to the client device. If no response is received within a specified time, the network controller determines that the client device is no longer associated with it. This method ensures accurate and timely detection of disconnections, allowing the network controller to take appropriate actions, such as reassigning network resources or updating connection logs. The system may also include additional features, such as logging disconnection events, notifying administrators, or triggering automated recovery procedures. The invention improves network reliability and security by providing a robust mechanism for detecting and responding to client device disconnections.
11. A network device, comprising: a hardware processor to execute instructions to: determine that a client device is assigned an Internet Protocol (IP) address by a Dynamic Host Configuration Protocol (DHCP) server; share user entries and DHCP server information among a plurality of network controllers that are in a Virtual Local Area Network (VLAN); detect that the client device is disconnected from a first network controller among the plurality of network controllers, based in part on the shared user entries, DHCP server information, and a determination that none of the plurality of network controllers detects a connection with the client device, wherein the first network controller is associated with the IP address; and responsive to the detection that the client device is disconnected from the first network controller: generate a DHCP release message on behalf of the client device; and generate the DHCP release message to the DHCP server.
The invention relates to network management in a Virtual Local Area Network (VLAN) environment, specifically addressing the challenge of tracking and managing client device connections across multiple network controllers. When a client device is assigned an IP address by a DHCP server, the network device shares user entries and DHCP server information among multiple network controllers within the VLAN. This sharing enables the system to detect when a client device disconnects from a first network controller, even if the device does not explicitly notify the network. The detection is based on the shared data and the absence of any network controller detecting an active connection with the client device. Upon detecting the disconnection, the network device generates a DHCP release message on behalf of the client device and sends it to the DHCP server. This ensures proper IP address management by releasing the IP address assigned to the disconnected device, preventing address conflicts and improving network efficiency. The system enhances reliability in dynamic network environments where client devices may frequently connect and disconnect.
12. The network device of claim 11 , wherein the instructions to determine that the client device is assigned the IP address by the DHCP server comprise instructions executable by the processor to snoop a message between the DHCP server and the client device.
A network device monitors and manages IP address assignments in a network environment where a DHCP server dynamically allocates IP addresses to client devices. The device includes a processor and memory storing instructions that, when executed, enable the device to detect whether a client device has been assigned an IP address by the DHCP server. This detection is performed by intercepting and analyzing communication between the DHCP server and the client device, specifically by snooping DHCP messages exchanged during the address assignment process. The device may also track the status of IP addresses, identify conflicts, and enforce policies to ensure proper address allocation. By monitoring these interactions, the network device helps maintain accurate IP address management, preventing conflicts and ensuring efficient network operation. The solution addresses challenges in dynamic IP address assignment, such as duplicate address issues and unauthorized device connections, by providing real-time visibility into DHCP transactions. The network device operates as an intermediary or observer, passively or actively monitoring DHCP traffic to verify address assignments and enforce network policies.
13. The network device of claim 11 , wherein the instructions to detect that the client device is disconnected from the first network controller comprise instructions executable by the processor to receive a de-association message from the client device.
A network device monitors connectivity between a client device and a first network controller in a wireless network environment. The device includes a processor and memory storing instructions that, when executed, detect disconnection of the client device from the first network controller. This detection occurs by receiving a de-association message from the client device, indicating the client device has intentionally terminated its connection to the first network controller. The network device may then facilitate a seamless handoff to a second network controller to maintain uninterrupted service. The solution addresses the challenge of maintaining reliable connectivity in dynamic wireless environments where client devices frequently move between access points or controllers, ensuring minimal service disruption during transitions. The network device operates within a system where multiple network controllers manage different segments of the wireless network, and the client device may roam between these segments while maintaining active sessions. The detection mechanism relies on standard wireless communication protocols that trigger de-association events, allowing the network device to proactively manage client transitions without manual intervention. This approach improves network efficiency and user experience by reducing latency and connection drops during mobility scenarios.
14. The network device of claim 11 , wherein the instructions to detect that the client device is disconnected from the first network controller comprise instructions executable by the processor to determine that a session or an entry corresponding to the client device has timed out.
A network device monitors client device connectivity to a first network controller in a wireless communication system. The device includes a processor and memory storing instructions that, when executed, perform operations to detect disconnection of a client device from the first network controller. The detection process involves determining that a session or an entry associated with the client device has timed out, indicating the client device is no longer actively connected. This timeout-based detection method ensures reliable identification of disconnections without requiring continuous polling or explicit disconnection messages. The network device may also facilitate handoff procedures to maintain service continuity when a client device transitions between network controllers. The system addresses challenges in wireless networks where client devices may move between coverage areas or experience signal degradation, ensuring seamless connectivity and efficient resource management. The timeout mechanism provides a scalable and efficient way to track client device status without excessive signaling overhead.
15. The network device of claim 11 , wherein the instructions to detect that the client device is disconnected from the first network controller comprise instructions executable by the processor to determine that the client device has failed to respond to one or more messages transmitted to the client device.
A network device monitors client device connectivity to a first network controller. The device includes a processor and memory storing instructions that, when executed, detect when a client device disconnects from the first network controller. Detection occurs by determining that the client device has failed to respond to one or more messages sent to it. The network device may also include instructions to manage network traffic, such as forwarding data packets between network controllers or client devices. Additionally, the device may support failover mechanisms, such as redirecting traffic from a failed network controller to a backup controller. The system ensures continuous network connectivity by identifying and responding to disconnections, preventing service interruptions. The network device operates in environments where reliable communication is critical, such as enterprise networks or data centers, addressing the problem of maintaining seamless connectivity despite device failures or network disruptions. The solution provides automated detection and response to disconnections, improving network resilience and reducing manual intervention.
16. The network device of claim 11 , wherein the instructions to detect that the client device is disconnected from the first network controller comprise instructions executable by the processor to determine that the client device has connected to a second network controller among the plurality of network controllers.
A network device monitors client devices connected to a network infrastructure comprising multiple network controllers. The device includes a processor and memory storing instructions that, when executed, perform operations to detect when a client device disconnects from a first network controller. This detection involves determining that the client device has established a connection to a second network controller within the same network infrastructure. The system ensures seamless handoff between network controllers, maintaining continuous connectivity for the client device as it moves between different access points or coverage areas. The solution addresses the challenge of maintaining stable network connections in environments where client devices frequently transition between controllers, such as in large-scale wireless networks or enterprise environments. The network device dynamically tracks client device associations to optimize resource allocation and minimize service disruptions during transitions. The instructions further enable the device to identify the specific second network controller to which the client device has reconnected, allowing for coordinated management of network resources and improved load balancing. This approach enhances reliability and performance in distributed network architectures.
17. The network device of claim 11 , wherein the instructions to generate the DHCP release message on behalf of the client device comprise instructions executable by the processor to identify a source of the DHCP release message as the client device.
This invention relates to network devices managing Dynamic Host Configuration Protocol (DHCP) operations on behalf of client devices. The problem addressed is the need for a network device to efficiently handle DHCP lease releases when a client device disconnects or is no longer active, ensuring proper network resource management and avoiding IP address conflicts. The network device includes a processor and memory storing instructions. When a client device disconnects or is no longer active, the network device generates a DHCP release message on behalf of the client device. This involves identifying the client device as the source of the DHCP release message, ensuring the DHCP server correctly processes the release and frees the assigned IP address. The network device may also monitor client device activity to determine when a DHCP release is necessary, such as detecting disconnection or inactivity. Additionally, the network device may manage multiple client devices, generating DHCP release messages for each as needed to maintain network efficiency. This approach reduces the risk of IP address exhaustion and ensures proper DHCP lease management in network environments where client devices may not reliably send their own release messages.
18. The network device of claim 11 , wherein the instructions to perform the generate and transmit operations are further responsive to a determination that a DHCP lease associated with the IP address has not expired.
A network device is configured to manage IP address assignments in a network environment where dynamic host configuration protocol (DHCP) leases are used. The device includes a processor and memory storing instructions that, when executed, cause the device to generate a message indicating that an IP address is available for assignment and transmit this message to a DHCP server. The transmission occurs in response to determining that a DHCP lease associated with the IP address has not expired, ensuring that the IP address remains valid and usable. The network device may also monitor network traffic to detect unused IP addresses, track lease expiration times, and communicate with the DHCP server to update IP address availability. This system improves IP address management by preventing premature reassignment of addresses still under active leases, reducing conflicts and ensuring efficient use of network resources. The device may operate as part of a larger network infrastructure, including routers, switches, or dedicated DHCP management systems, to maintain accurate IP address allocation records. The solution addresses the problem of inefficient IP address utilization in networks where DHCP leases are dynamically assigned, particularly in environments with high device mobility or frequent address changes.
19. The network device of claim 11 , wherein the instructions to perform the generate and transmit operations are further responsive to a determination that a DHCP release message has not been transmitted by the client device.
A network device is configured to manage network address assignments in a local area network (LAN) environment where a client device is connected. The device includes a processor and memory storing instructions that, when executed, cause the processor to generate and transmit a network address assignment message to the client device. This message includes a network address and a lease time for the client device to use the assigned network address. The network address assignment message is generated and transmitted in response to a determination that a DHCP (Dynamic Host Configuration Protocol) release message has not been transmitted by the client device. This ensures that the client device retains the assigned network address for the duration of the lease time, preventing unnecessary reallocation of the address while the client device remains active. The network device may also monitor the client device's activity to detect disconnections or other events that would trigger a release of the assigned network address. The instructions further enable the network device to handle DHCP operations, including responding to DHCP requests and managing address leases to optimize network address utilization. The system improves network efficiency by reducing unnecessary address reassignments and ensuring stable network connectivity for active devices.
Unknown
January 9, 2018
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